Kids seem to love these mash-ups. It appeals to their dual desires of flaunting copyright laws and hearing lots of songs all at once. It’s a short-attention-span, intellectual-property-law jamboree. And this latest Girl Talk album is a sampling bonanza sure to boggle the minds behind any copyright claims. They somehow mash Public Enemy and Heart like they were always meant to be together, except it only lasts for a few seconds until the next random combination appears.